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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/android/activity_status.h"
#include <jni.h>
#include "base/memory/singleton.h"
#include "jni/ActivityStatus_jni.h"
namespace base {
namespace android {
ActivityStatus::Listener::Listener(
const ActivityStatus::StateChangeCallback& callback)
: callback_(callback) {
ActivityStatus::GetInstance()->RegisterListener(this);
}
ActivityStatus::Listener::~Listener() {
ActivityStatus::GetInstance()->UnregisterListener(this);
}
void ActivityStatus::Listener::Notify(ActivityState state) {
callback_.Run(state);
}
// static
ActivityStatus* ActivityStatus::GetInstance() {
return Singleton<ActivityStatus,
LeakySingletonTraits<ActivityStatus> >::get();
}
static void OnActivityStateChange(JNIEnv* env, jclass clazz, int new_state) {
ActivityStatus* activity_status = ActivityStatus::GetInstance();
ActivityState activity_state = static_cast<ActivityState>(new_state);
activity_status->OnActivityStateChange(activity_state);
}
bool ActivityStatus::RegisterBindings(JNIEnv* env) {
return RegisterNativesImpl(env);
}
ActivityStatus::ActivityStatus()
: observers_(new ObserverListThreadSafe<Listener>()) {
Java_ActivityStatus_registerThreadSafeNativeStateListener(
base::android::AttachCurrentThread());
}
ActivityStatus::~ActivityStatus() {}
void ActivityStatus::RegisterListener(Listener* listener) {
observers_->AddObserver(listener);
}
void ActivityStatus::UnregisterListener(Listener* listener) {
observers_->RemoveObserver(listener);
}
void ActivityStatus::OnActivityStateChange(ActivityState new_state) {
observers_->Notify(&ActivityStatus::Listener::Notify, new_state);
}
} // namespace android
} // namespace base
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